Pump



July 23, 1929. Q w UFE 1,721,825

PUMP

Filed Nov. 19, 1927 l I l I i I( 16 Il 5 I f3 f Il n I I y I A I I 19 l1 ll' 2,5 12

J4. e Y it m 9 1 i B y ,27 a@ J5 l l B l i p20 l 6 l] I f5 @wf i INVENTR Patented July 23, 1929.

UNITED STATES PATENT OFFICE.

PUMP.

Application filed November 19, 1927. Serial No. 234,511.

This invention relates particularly to vertical shaft centrifugal pumps.

It is one object of the invention to provide a bearing structure for the lower end of the drive shaft whereby to maintain the samel in accurate concentric relation to the discharge casing and bowls.

It is another object of the invention to provide a bearing structure for the lower end of the drive shaft of a centrifugal pump that may be thoroughly lubricated and completely closed oft' from the water in the well whereby to prevent wearing away of the parts by sand and foreign elements in the water.

It is still another object of the invention to provide a structure of the character indicated -that will maintain perfect alignment of the several impellers.

It is also an object of the invention to provide a pump structure so constructed and arranged that the several impellers and bowls may be quickly and easily assembled in desired numbers.

Finally, it is an object of the invention to provide a pump structure of the character indicated that will be economical to manufacture, simple, durable and highly efficient in its -practical application.

In the drawing:

. The figure is a longitudinal section through a portion of a pump structure embodying my invention.

Referring now mor@ particularly to the drawing, I show at 1--1 discharge casing sections of a deep well centrifugal pump vconnected bv a coupling as 2 supporting a shaft bearing 3.

The lower end of the bottom casing 1 is ,threaded to receive a bottom supporting member 4 which in turn is provided with webs as at 4 for carrying a shaft support 5 in concentric relation to the casing 1. This member 4 is provided with a sh oulder 6 somewh at wider than the thickness of the casing 1 as indicated for the purpose hereinafter set forth. In the shaft support 5 is fixedly mounted a stud-shaft7 in axial alignment with the casing 1 and in fixed relation thereto.

At 8 is shown an annular member seated upon the shoulder 6 and sliding snugly within the casing 1 for the purpose of properlv positioning the upper bowls 9 and 10. These bowls 9 and 10 are 'also slidably inserted in the casingn 1, one upon the other` and held immovably in place by a collar 11 screwed into the casing 1 as shown. Each of the bowls has an inwardly flaring portion at its upper end to form a neck as at 12 and 13 respectively, suitable vanes as 14 and 15 being formed therein to change the rotary movement of the water to a substantially vertical movement.

At 16 I show the drive shaft of the pump engaging the bearing 3 and having va chamber 17 formed in its lower end. For the purpose of forming the chamber 17 the shaft is considerably enlarged throughout that portion of its lower end designed to carry the several impellers as at 18, and Within the chamber being slidably mounted on the part 18 and held in fixed relation thereto to revolve therewith by means of a collar or nut 25 threaded onto the part 18 as shown.

Each impeller is formed with a lower portion as 26 extending into the neck of the next lower bowl, and is provided with passages and vanes` as at 27 and 28 Haring upwardly and outwardly to discharge against the vanes of the encompassing bowl. v 4

In assembling this pump the chamber 17 is placed in position packed with a suitable lubricating grease, the impellers and bowls are placed as described and secured by nuts 11 and 25, and the upper shaft bearings and discharge sections arranged in position. By mounting the drive shaft on the stub-shaft 7 extending upwardly from below and in the bearing 3 above, both shaft and bearing being supported bythe same casing structure, the drive shaft and all of the elements rotating therewith must of necessity be held in their proper alignment as long as the bearings are true, and since the bearings on the stubshaft 7 are imbedded in grease in such a manner that no sand-bearing water can reach them they will remain true for an indefinite period of time. This construction is such that there is no material force acting upon `the contents of the chamber 17 at any time.

loo

water pressure may be. When the pump-is in operation, the water is drawn away from the stub-shaft 7 and consequently there is no prtslsure to force the water past the packing a It is to be understood, of course, that while I have herein shown and described but one specific embodiment of the invention, changes in form, construction and method of operation and assembly may be made Within the scope of the appended claims.

I claim:

1. In a pump, a supporting shaft rigidly mounted in axial alignment with the drive shaft, and a drive shaft having a chamber positioned on one end thereof and encompassing the supporting shaft, sealing means inserted between the supporting shaft and the lower end of the chamber wall whereby the chamber is closed against the ingress or egress of a lubricant, and bearings inserted between the shafts within the chamber. Y

2. In a pump, a supporting shaft fixedly mounted in axial alignment with the drive shaft, and a drive shaft having a chamber formed on one end thereof and encompassing the fixed shaft, bearings inserted between the shafts within the chamber, a closure for the chamber revolving therewith and encompassing the fixed shaft and provided with a lat- `erally extending flange, an impeller supported by the flange, to rotate with the drive shaft, and a bowl operatively mounted relative to the impeller.

3. In a pump, a casing, a supporting member mounted thereon, a supporting shaft fixedly mounted on 4the supporting member in concentric relation to the casing, a bowl slidably mounted in the casing and engaging the supporting member and means for securing the bowl in position, a drive shaft having a chamber formed on one end thereof and encompassing the fixed shaft, bearings inserted between the shafts within the chamber, a

-closure for the chamber revoluble with the ing grease, bearings inserted between the shafts within the chamber, a closure for the chamber revolving therewith and encompassing the fixed shaft, and impeller supporting means formed on the closure.

' CHARLES W. LIPE. 

